A scientist hydrolyzes ATP in allaboratory test tube. He finds that about 3 times as much heat is released than when the same amount of ATP is hydrolyzed in a cell.

What best explains the scientist's observation?

Choose 1

Cells often convert some of the energy from ATP hydrolysis into other usable forms.

Cells are less efficient at producing heat.

Enzymes in cells use heat energy to catalyze reactions.

ATP hydrolysis in a cell makes different products than in a test tube.